[plt-scheme] cptr?

From: Ron Stanonik (stanonik at Cogsci.ucsd.edu)
Date: Mon Jun 24 12:01:59 EDT 2002


I'm working on a C extension that returns a cptr to scheme.
Scheme later uses the cptr in calls to the extension.

In C I can test if a scheme value is a cptr with SCHEME_CPTRP_TYPE,
but there doesn't seem to be a predicate in scheme to test if a value
is a cptr.  The obvious names "cptr?", "cptrp?", and "c-pointer?" are
undefined, but scheme does know that the value is a cptr.

  > x

Is there a predicate for cptrness?


Ron Stanonik
stanonik at cogsci.ucsd.edu

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